Homemade Baking Soda Spray
I used water and dishwashing liquid. Very effective. I sprayed 3 times only on our tomatoes and eggplants 3 days apart and it never came back. We have very healthy tomatoes.
I used simple mix of Dawn and water immediately after discovering the mildew, soaked the four rose bushes thoroughly,next morning completely gone, amazing idea people, thank you
I researched and learned that a cucumber vine life-span is 70-80-days. My cucumber vine did die; however, it was past 70-days, had produced many cucumbers and I feel it died from age and not from the spray.
Not sure about using baking soda. I had a beautiful cucumber that produced a colander of cucumbers each week. It began to get powdery mildew. I used the recipe according to instructions; sprayed early in the morning. The days afterward were cloudy and the vine looked healthy. Two weeks later, however, the vine is turning yellow; appears to be dying and there are no cuke. I have kept up the watering. I will begin watering with 20-20-20; maybe the baking soda leached out important nutrients...Not sure what happened?
I started using Bee Safe 3-in-1 Garden Spray (Organocide) on my squash plants when I saw powdery mildew. The white spots faded within a day and I simply spray every few days as more appears (which is not very much). This product contains sesame oil so may be available in other forms as well.
I’m not sure of the most effective way to get rid of this. There are also repeated holes. I did find micro black and pale yellow dots on the undersides. Help needed re rust and yellow leaves on my cake leaves and okra. Thanks
Every year my peony bushes get powdery mildew really bad. Is the water/other additives you recommend spraying good for peonies??
The previous response here to your question, along with info I also found here at Farmer's Almanac, helped me tremendously to (mostly) vanquish the powdery mildew on my peonies. I was surprised to learn that washing down the plants would help. It seems counter intuitive to use water to combat mildew, but it really works! Last season, the lovely foliage on my peonies looked awful, ravaged by mildew. This year, as soon as I noticed the mildew returning, I used a neem oil and water mix spray, coating all the leaves about twice a week. Do this at night. Alternate days that follow nights when you have not used the neem, spray down the plants in the morning so they can sun dry fully later in the afternoon. I use just a gentle shower from a rain spray attachment, no need to get out the pressure washer! Now, at the near end of the season, almost no mildew visible at all, glossy leaves, lovely green. If you notice a leaf cluster getting mildew, remove it. So a fast couple minutes about four times weekly with your peonies will eliminate the mildew. I'm extremely pleased with the advice I got here and the addition of the neem oil spray really seems to make a difference, too. (Bonus: a potted maple sapling that was getting maple fungus has been cured with the neem oil, too!)
Spraying the leaves now won't hurt them but it won't help either. To really do any good you should start spraying the new growth in the spring before the mildew starts as a preventative. If the leaves are terribly afflicted, cut them off and be sure to remove any other leaves that fall at the end of the season to get rid of fungal spores that will infect the plant next year.